Remove the setting of default accept header for main resources

Source/core/loader/FrameFetchContext.cpp

Index: Source/core/loader/FrameFetchContext.cpp
diff --git a/Source/core/loader/FrameFetchContext.cpp b/Source/core/loader/FrameFetchContext.cpp
index fa2d09f1637d988c985ebb7b46355737f4b31d9a..b5dd401117f5dea8ba03bdc88444bbeb2e7237dd 100644
--- a/Source/core/loader/FrameFetchContext.cpp
+++ b/Source/core/loader/FrameFetchContext.cpp
@@ -45,8 +45,6 @@
 
 namespace WebCore {
 
-static const char defaultAcceptHeader[] = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
-
 FrameFetchContext::FrameFetchContext(LocalFrame* frame)
     : m_frame(frame)
 {
@@ -91,9 +89,6 @@ void FrameFetchContext::addAdditionalRequestHeaders(Document* document, Resource
 
     m_frame->loader().applyUserAgent(request);
 
-    if (isMainResource)
-        request.setHTTPAccept(defaultAcceptHeader);
-
     // Default to sending an empty Origin header if one hasn't been set yet.
     FrameLoader::addHTTPOriginIfNeeded(request, nullAtom);
 }